Tachometer



c. H. VEEDER. TACHOMETER. PPLICATION FILED MAVZB, v1919.

Patented May 31', 1921.

3 SHEETS-slain l.

l 19a-f2.

v WWA/ESS.- Mgg c. H. VEEDEIL TACHOMETEH.

APPLICATION FILED MAY 28| I9I9.

Patented May 31,1921.

3 SHEETS-SHEET 2.

C' HIQVEEDER.

TAC'HOMETER. APPLICATION FILED MAYze, 1919.

Patented May 31,1921

3 SHE'ETSHSHT I STI t,

cURTIs nUssEY VERDER, or HARTFORD, coNNEcTIcUT, nssienoR Tjo TiIEJvER'DR/R "MANUFACTURING ycoivrrArm 'or' HARTFORD, coNNEcTicUTyA. coRroRATIon orj coNNEcTIcUT. 2 z l i To all V'whom 'it may concern.;

f Be itv known that I, CURTIS HUssEY VEEDER, a citizen of the United States, residing in thecity of Hartford7 in the VStateV of Connecticut, have invented certain new and useful Improvements in Tachometers,

of whichthe following is a specification, ref# erence being had to the accompanying drawin s, forminga part hereof.

. y his invention relates to instruments'v of the `same general character as that shown and Ydescrlbed. in Letters Patent of the United .States,-Nos. 732,975 and 733,358, both dated July7, 1903, and No. 1,016,906, dated Feb. 6, 1912, inwhich the speed of rotation of .shafts and otherrotating bodies Aisindicated and measured bythe height ofv a' column of liquid acted upon by an im: peller which is driven from vor bya shaft 'or other rotating body. The kinvention is concerned particularlyl with Avarious features of lconstructionand has for Aits object to facilitate manufacture and to improve the operation, with .special reference tothe attainment of a high degreeV of accuracy. The invention will be more fully explained hereinafter with reference to the accomlpanying drawings, .in,which is illustrated an embodimenty of the invention, and in which--r e l Y Figure -1Y is a viewv infront elevation of a tachometer which embodies the invention, partly broken outto;v save space.

Fig. E?,v is a top view. f Fig. 3 is a view in section on the plane indicated 4by thebroken line 3-'3 of: Fig. 1, looking in the direction of theV arrows.

Fig. 4 is a detail viewin section on the irregular plane indicated by the broken line of Fig. 1, looking in the .direction of the arrows..V

Fig., 5 is a view in section on the plane indicated by the brokenline 5-5 ofFig. 1,V

ylooking inthe vdirection of the arrows, the scale of Fig.` 5, as well as of Figs. 2, 3 andra being larger than that lof Fig-1. r f Fig. 6 is a 4view in section of the lower part of the instrument, onthe plane indi-V cated bythe broken line 36*-6 of Fig. 5, looking in the direction of the arrows, the scale of this` figure being somewhat larger than that of AFig.5.

' VFiga?` is a vview 1n isectlon and on the same the broken line 7 7 of Fig. 5.1

V.scale as Fig..y 6, onthe' plane indicated by'.

'n TAGHOM'ETER.``

Specification of Letters Patent. i

'different ratios.

u Patented; May 31,1921; Y Y i Application filed Mayes, 1919. serial nacemos. i

I rigs. s,l 9 and 10m defaugvliwsiiiisf shaft'in sectionandthe'top -plate of theI casin broken away toshowthejmpeller.

hev base a is'formed in oneintegral piece' andis chamberedas at a toform'part of a reservoir for the liquid.` It receives from -its under side a block Lbin which isffornied a chamber b for the reception 'of theimp'eller c, the chamberb being closed from thefbotl tom by a cap b2 which is soldered.to"'the block, the block and cap beingrheld in place by a plate a? secured toA thebase by screws:y

a3.. The plate azandc'ap b2 Vare formed sepal 1t will be yobservedfthat there is one ma'- construction permits the desired. accuracy of `rately for convenience in manufacture-.but constitute .1n eect a chambered'cap-plate.l

. chined joint' at 'a4 fand, .onetapered land j Y ground joint at'afbetweenv the block bwhich fitk andtightness to A`beise'curedwith le'ssdif` iculty' in lmanufacture "than Y the former constructions.'

n y Folfrned'partlyA in thepbase",l ci...fand;partly inthe impeller case b, at thetap'ere'djoiit fasrsisibl in a, is an annular channel Zgjflvvhich'comini;ni`I` cates with the ilnpeller chamber'b. throughV i radial openings 155 shownrv mostf,clearly in ,Fig 11. Thefb'ottom plate .a2 lis 'recessed' to form a chamber@6 which communicates with the impeller chamber"b"through at central opening be and with thereservoira byan opening v257 formed throughthe'iinpeller case,

as shown most clearly in Fig. (6.

bs also establishes; comlilunication.v4 between the reservoirv and. the: upper .side off thelim'- peller chamber so that the impeller chain ber is in. communication` with-fthe reservoir bothfffromabove and from bellow, `whereby a freer andmore uniform :circulationf'the liquid is permitted.U 'The block @which forms the impellerl caseis extendedl upward' withinthe baseV a,withfa 'cylindrical joint at 'ai as above indicated. It has formed' therei in, at b9, acylindrical bearing or guide for the4 driving, spindle of .the impeller,with kvertical.'grooves'formed therein, as .atf 221,

`which communicate withthe bore ""o'f the c2, with interposed radial blades c3 which.

kdo not reach the hub, a` space thus being left at thecenter ofthe impeller as well as at the outer edge; while `the blades or armsV are connected and supported by a thin annulus c4. Thisrconstruction of the impeller facilitates ythe escape of the entrained air to the vertical grooves Z210 as above referred to. rlhe limpeller is driven by a shaft l, to the lower end of which itmay be secured by solder Vor other suitable means. The shaft d is a short shaft, supported by a ball bearing d',

` whichis above the level of the liquid in the Vreservoir and in which the shaftis made vertically adjustable so that the impeller, supported by the shaft, can be adjusted with accuracy to its proper position in the center ofthe impeller'case. To this end the upper end ofthe shaft is split and receives a screw d?, the headl of which is tapered, so that the end of theshaft can be expanded within the sleeve d3 of the ball-bearing. The shaft and impeller vare adjusted when the screwV is loosened. and are then secured in position by driving the screw home.Y

yThe shaft cl is driven by another shaft sectionewhich similarly is supported by a l ball bearingA e at its upper end, in which the tapered screw e2 and sleeve e3.

. bearlnge is supported by a top plate or capl shaft is adjustably secured `by means of the rllhe ball e4 of a casing f, swiveled upon the base a so that itcan be turned about a vertical axis to more than 180. upon Vthe base by a two-part doubly iianged ringf whichengages tapered ianges f2 on the base and case respectively, so that when the two parts of the fianged ring are set up` by the screws f3, shownin vFig. 5, the case f will be held .in adjusted position. The purpose-of such adjustment is to facilitate connection tothe shaft or other part, the speed of rotation of which is to be indicated. The driving'mernber gA is mounted in suitable bearings in anextension f4 of the case 7 and the intermeshing gears, by which the shaft e is driven from thev'shaft g are removably secured on the respective shafts so'that gears of different ratios may be used vaccording tozthe requirements of eachparticular case. As lshown in Fig; 6, the pinion g having la splity sleeve g2 is secured on the shaft g by a nut g3? and meshes with a bell gear i having a split sleeve 2 secured on the shaft e by a rlhe Vcase 7" is secured nut. Other gear ratios are indicated in Figs.v 8, 9 and 10,l the same reference characters being employed to indicate like parts although of different sizes.;l 1

In the reservoir a is mounted the usual plunger it for the purpose of regulating the height of the liquid in the reservoir: bydisplacement. The plunger h is screw-threaded to engage a sleeve it mounted on the extension of the impeller case 5 kand formed at its upper end with a beveled gear h2 for engagement with a beveled pinion h3 on the end of a shaft h4 rotatable in a sleeve h5 fitted tightly in the base a, the shaft h4 being provided with a thumb-wheelk LG'outside of the base whereby adjustment of the plunger canL be effected readily; v

The chambers a, a9 are connected at as and all below and above the plunger 'h 'and communicate through the hollow standards 610 with the cap @12. The .indicator tube 7c havingY a suitable scale 'la' in proper rela tion therewith, communicates `at its upper end withthe channeled cap w12 and at its lower end with the vannular' channel b4 through a channel 7a2 controlled by a suitable valve 7c3. The formation ofthe supplemental chambers a9 independent ofthe chambera in whichis located the plunger, the connection of the two chambers above and below the plunger and the connection of the supplemental chamber to the channele'dlcap permits free movementofthe liquid.

The'mode of operation of theimproved instrument is substantially the same as the mode of operation of vthe instruments described in the patents 'referred y.toand no further explanation is required. It will be obvious that the improvements herein described contribute to^ facility and accuracy in construction and to uniformity and accuracy in operation.

l claim as my invention: n A

1.7In an instrument of the character described, the -combination of an integral base, chambered from its under side, ya block chambered from its under side to receive an impeller, and provided 'withaf discharge opening, a reservoir chamberV being formed in the base above the bloclnan-impeller, and a chambered cap-plate to close the impeller chamber from below, a channel being formed in the block to effect, communicationffrom the chamber above tlie block tothe upper side of the impeller chamberat its center, and channels being also provided to establish communication between the chamber of the cap-plate and thechamber abover the block and the lunder side of the impeller chamber at its center.

2. In an instrument of 'the character de'- scribe'd, the combinationfof'an integral base,

chambered from its under side to form a reservoir, a block chambered'to receive an imvbase and having also a tubular extension impeller located wholly above the impeller and extended downward through the tubu-V lar extension.

3. In an instrument of the character described, the combination of an integral base,

chambered from its under side to forma reservoir, a block chambered to recelve au impeller and fitted within the base and provided with a discharge opening, a cap to close the under side of the impeller chamber, an imperforate holding plate secured to the under side of the base to retain the block and cap in position, an impellerand driving means for the impeller located wholly above the impeller, a chamber being formed between the plate and the cap, the block having an opening to-establish communication between the reservoir and the last named chamber, and an opening to establish communication between the reservoirV and the impeller chamber, and the cap having an openingto establish communication between the chamber under the cap and the impeller chamber, whereby the impeller chamber communicates both from its upper side and from vits under side with the reservoir. v

4c. In an instrument of the character described, the combination of a base chambered from its under side to form a reservoir, a block chambered to Vreceive an impeller and iitted within the'base and having an upward tubular extension through the reservoir, the reservoir and the impeller chamber being in communication, an impeller, and a shaft extended downward throu h the extension of the block to support t e impeller, the extension of the block being formed with air-ways to permit the escape of air from the impeller chamber.

5. In an instrument of the character described, the combination of ,a base, a block fitted in the'base and chambered to receive animpeller and having also an upward ex- `tension,a ball bearing located in the upper part ofthe' extension and having an internal sleeve, and a shaft adjustably supported in the sleeve of the bearing and having the impeller secured thereto at its lower end.

' 6. In an instrument of the lcharacter described, the combination of a hase, a block fitted in the base and chambered to receive part of the extension and havingian internal Y sleeve, and a shaft having'the impeller `seupper end and to be expanded within the sleeve of the bearing.

7. In an instrument of the vcharacter scribed, the combination of a base having a reservoir formed therein, an impeller casing itted within the reservoir and havinga cy-A lindrical extension upward through the resthereby 'ervoir, a sleeve mountedrotatably on` theV extension, screw threaded externally,` and formed with gear-teeth at its upper end, a

plunger mounted adjustably on the screwthreaded sleeve, anda shaftmounted in the base and having a pinion to engage the gearteeth vwith the sleeve.

cured thereto at its lower end and split and threaded to receive a tapered screw in its) leV Y 8. In an instrument ofthe character described, the combination of a base having an imperforate bottom, a casing Vmounted on the base and adjustable about a verticvalaxis,

an impeller, a vertical driving shaft mount- 1 ed in the base and casing, a horizontaldriving shaft mounted inthe casing above' the impeller and movable therewith aboutthe vertical axis, and intermeshing bevel gears mounted on the vertical shaft and horizontal f shaft respectively.

v9. In an instrument ofthe character de-v'; scribed, the combination of a base havingV an,

imperforate bottom,` a casing mounted on the base and adjustable. about a7 vertical axis,

the `base of the casing having tapered, paral-Y j lel flanges, .a split, flanged collar embracing the tapered flanges of the base and casing,`

peller,1and intermeshing bevel gears mounted Von the vertical shaft and the horizontal A. ,v

shaft respectively.

10. In an instru scribed, the combination of an vintegral base, j chambered to.. form 'ay reservoir, a lblock ment of thecharacter de-ir l v l,

chambered to receive an impeller and having a taper lit within the base, -a cap -tol close the impeller chamberV andhaving `a tight joint with said block, and a .holding'- plate secured to the basexand forming .with

said cap a chamber, `an outlet chamber being formed in the tapered surfaces of thebase and the block and communicating Vwith the impeller chamber through radial kopenings throu h the chamberformed' by the cap and the plate. 1 p r l Y Thisy sp'eciication signed May, A. D. 1919. v

CURTIS HussnrV VEEDER; j

through the block and the impeller chamber beingin communication centrally directly with the reservoir on the one side and indie rectly on the other side kwith the reservoir 

